PMHNP ANCC CERTIFICATION EXAM
QUESTIONS AND CORRECTS WITH
RATIONALES/ GRADED A+/2026 UPDATE
/100%CORRECT 2026/2027 EDITION
DOMAIN I: SCIENTIFIC FOUNDATIONS (Questions 1–19)
1. A patient with panic disorder shows reduced heart rate variability (HRV). Which neurotransmitter
system is most directly responsible?
A. Dopamine – Incorrect: Dopamine modulates reward/motor function, not autonomic tone in panic.
B. Norepinephrine – Correct: Low HRV reflects sympathetic overdrive & reduced parasympathetic tone;
norepinephrine dysregulation is central in panic.
C. GABA – Incorrect: GABA deficits cause anxiety but HRV link is stronger with NE/autonomic.
D. Acetylcholine – Incorrect: ACh is parasympathetic; panic has relative parasympathetic withdrawal,
not primary ACh excess.
2. Hyperactivity of which brain region is most consistently found in PTSD hyperarousal?
A. Hippocampus – Incorrect: Hippocampal volume is reduced (memory impairment), not hyperactive.
B. Prefrontal cortex – Incorrect: PFC is hypoactive in PTSD (poor top-down control).
C. Amygdala – Correct: Amygdala hyperreactivity to threat cues drives hyperarousal.
D. Thalamus – Incorrect: Thalamus relays sensory info; not primary site of hyperarousal.
3. A depressed patient has low CSF 5-HIAA. This metabolite comes from:
A. Dopamine – Incorrect: Dopamine metabolite = HVA.
B. Serotonin – *Correct: 5-HIAA = 5-hydroxyindoleacetic acid, serotonin’s main metabolite.*
C. Norepinephrine – Incorrect: NE metabolite = MHPG.
D. Epinephrine – Incorrect: Epi metabolite = metanephrine.
4. HPA axis negative feedback primarily occurs via:
A. CRH on anterior pituitary – Incorrect: CRH stimulates ACTH, not feedback.
B. Cortisol on hippocampus and pituitary – Correct: Glucocorticoid receptors there suppress CRH & ACTH.
C. ACTH on adrenal cortex – Incorrect: ACTH stimulates cortisol, not feedback.
D. DHEA on hypothalamus – Incorrect: DHEA modulates but is not primary feedback.
5. Which genetic variant is most associated with treatment-resistant depression (TRD)?
A. COMT Val158Met – Incorrect: Affects cognition/catecholamines, not strongly TRD.
B. BDNF Val66Met – Correct: Met allele reduces neuroplasticity, linked to poor antidepressant response.
C. SLC6A4 (5-HTTLPR) short allele – Incorrect: Links to stress sensitivity, not specifically TRD.
D. MTHFR C677T – Incorrect: Affects folate metabolism; some role but not top finding.
, 6. A patient with schizophrenia has increased D2 receptor occupancy. Which pathway correlates with
negative symptoms?
A. Mesolimbic – Incorrect: Hyperactivity here → positive symptoms.
B. Mesocortical – Correct: Hypodopaminergia in mesocortical → negative & cognitive symptoms.
C. Nigrostriatal – Incorrect: EPS pathway.
D. Tuberoinfundibular – Incorrect: Prolactin elevation.
7. Which brain structure is last to fully mature (into mid-20s)?
A. Amygdala – Incorrect: Matures earlier.
B. Hippocampus – Incorrect: Matures in adolescence.
C. Prefrontal cortex – Correct: Myelination & synaptic pruning continue to ~25 years.
D. Cerebellum – Incorrect: Motor coordination, earlier maturation.
8. The “kindling” model in bipolar disorder suggests:
A. Medications lose effect over time – Incorrect.
B. Each mood episode lowers threshold for next episode – Correct: Sensitization/kindling → more
frequent episodes without prophylaxis.
C. Genetic loading is irrelevant – Incorrect.
D. Only manic episodes kindle – Incorrect: Depressive episodes also kindle.
9. Which neurotransmitter is primarily degraded by MAO-B?
A. Serotonin – Incorrect: Mainly MAO-A.
B. Norepinephrine – Incorrect: MAO-A.
C. Dopamine – Correct: MAO-B preferentially degrades dopamine.
D. Glutamate – Incorrect: Not degraded by MAO.
10. A patient with anorexia nervosa shows low bone density. Which hormone axis is most
suppressed?
A. Thyroid – Incorrect: May be low but not primary driver of bone loss.
B. Hypothalamic-pituitary-gonadal (HPG) – Correct: Hypogonadotropic hypogonadism → low
estrogen/testosterone → bone loss.
C. HPA – Incorrect: Cortisol often elevated, which worsens bone but HPG is more specific.
D. Growth hormone – Incorrect: GH may be normal or low.
11. Which sleep architecture change is typical in major depression?
A. Increased slow-wave sleep – Incorrect: Decreased.
B. Prolonged REM latency – Incorrect: Shortened REM latency.
C. Decreased REM density – Incorrect: Increased REM density.
D. Reduced REM latency – Correct: REM onset <60 min is hallmark.
12. The therapeutic mechanism of SSRIs is most directly related to:
A. Upregulation of postsynaptic 5-HT1A receptors – Incorrect: Downregulation occurs with chronic
treatment.
B. Immediate increase in synaptic serotonin – *Correct: Blocks SERT → rapid rise in 5-HT; but clinical lag
due to downstream changes.*
C. Antagonism of 5-HT2A – Incorrect: Not primary.
D. Increase in norepinephrine – Incorrect: SSRIs are selective.
QUESTIONS AND CORRECTS WITH
RATIONALES/ GRADED A+/2026 UPDATE
/100%CORRECT 2026/2027 EDITION
DOMAIN I: SCIENTIFIC FOUNDATIONS (Questions 1–19)
1. A patient with panic disorder shows reduced heart rate variability (HRV). Which neurotransmitter
system is most directly responsible?
A. Dopamine – Incorrect: Dopamine modulates reward/motor function, not autonomic tone in panic.
B. Norepinephrine – Correct: Low HRV reflects sympathetic overdrive & reduced parasympathetic tone;
norepinephrine dysregulation is central in panic.
C. GABA – Incorrect: GABA deficits cause anxiety but HRV link is stronger with NE/autonomic.
D. Acetylcholine – Incorrect: ACh is parasympathetic; panic has relative parasympathetic withdrawal,
not primary ACh excess.
2. Hyperactivity of which brain region is most consistently found in PTSD hyperarousal?
A. Hippocampus – Incorrect: Hippocampal volume is reduced (memory impairment), not hyperactive.
B. Prefrontal cortex – Incorrect: PFC is hypoactive in PTSD (poor top-down control).
C. Amygdala – Correct: Amygdala hyperreactivity to threat cues drives hyperarousal.
D. Thalamus – Incorrect: Thalamus relays sensory info; not primary site of hyperarousal.
3. A depressed patient has low CSF 5-HIAA. This metabolite comes from:
A. Dopamine – Incorrect: Dopamine metabolite = HVA.
B. Serotonin – *Correct: 5-HIAA = 5-hydroxyindoleacetic acid, serotonin’s main metabolite.*
C. Norepinephrine – Incorrect: NE metabolite = MHPG.
D. Epinephrine – Incorrect: Epi metabolite = metanephrine.
4. HPA axis negative feedback primarily occurs via:
A. CRH on anterior pituitary – Incorrect: CRH stimulates ACTH, not feedback.
B. Cortisol on hippocampus and pituitary – Correct: Glucocorticoid receptors there suppress CRH & ACTH.
C. ACTH on adrenal cortex – Incorrect: ACTH stimulates cortisol, not feedback.
D. DHEA on hypothalamus – Incorrect: DHEA modulates but is not primary feedback.
5. Which genetic variant is most associated with treatment-resistant depression (TRD)?
A. COMT Val158Met – Incorrect: Affects cognition/catecholamines, not strongly TRD.
B. BDNF Val66Met – Correct: Met allele reduces neuroplasticity, linked to poor antidepressant response.
C. SLC6A4 (5-HTTLPR) short allele – Incorrect: Links to stress sensitivity, not specifically TRD.
D. MTHFR C677T – Incorrect: Affects folate metabolism; some role but not top finding.
, 6. A patient with schizophrenia has increased D2 receptor occupancy. Which pathway correlates with
negative symptoms?
A. Mesolimbic – Incorrect: Hyperactivity here → positive symptoms.
B. Mesocortical – Correct: Hypodopaminergia in mesocortical → negative & cognitive symptoms.
C. Nigrostriatal – Incorrect: EPS pathway.
D. Tuberoinfundibular – Incorrect: Prolactin elevation.
7. Which brain structure is last to fully mature (into mid-20s)?
A. Amygdala – Incorrect: Matures earlier.
B. Hippocampus – Incorrect: Matures in adolescence.
C. Prefrontal cortex – Correct: Myelination & synaptic pruning continue to ~25 years.
D. Cerebellum – Incorrect: Motor coordination, earlier maturation.
8. The “kindling” model in bipolar disorder suggests:
A. Medications lose effect over time – Incorrect.
B. Each mood episode lowers threshold for next episode – Correct: Sensitization/kindling → more
frequent episodes without prophylaxis.
C. Genetic loading is irrelevant – Incorrect.
D. Only manic episodes kindle – Incorrect: Depressive episodes also kindle.
9. Which neurotransmitter is primarily degraded by MAO-B?
A. Serotonin – Incorrect: Mainly MAO-A.
B. Norepinephrine – Incorrect: MAO-A.
C. Dopamine – Correct: MAO-B preferentially degrades dopamine.
D. Glutamate – Incorrect: Not degraded by MAO.
10. A patient with anorexia nervosa shows low bone density. Which hormone axis is most
suppressed?
A. Thyroid – Incorrect: May be low but not primary driver of bone loss.
B. Hypothalamic-pituitary-gonadal (HPG) – Correct: Hypogonadotropic hypogonadism → low
estrogen/testosterone → bone loss.
C. HPA – Incorrect: Cortisol often elevated, which worsens bone but HPG is more specific.
D. Growth hormone – Incorrect: GH may be normal or low.
11. Which sleep architecture change is typical in major depression?
A. Increased slow-wave sleep – Incorrect: Decreased.
B. Prolonged REM latency – Incorrect: Shortened REM latency.
C. Decreased REM density – Incorrect: Increased REM density.
D. Reduced REM latency – Correct: REM onset <60 min is hallmark.
12. The therapeutic mechanism of SSRIs is most directly related to:
A. Upregulation of postsynaptic 5-HT1A receptors – Incorrect: Downregulation occurs with chronic
treatment.
B. Immediate increase in synaptic serotonin – *Correct: Blocks SERT → rapid rise in 5-HT; but clinical lag
due to downstream changes.*
C. Antagonism of 5-HT2A – Incorrect: Not primary.
D. Increase in norepinephrine – Incorrect: SSRIs are selective.
